| // This file was procedurally generated from the following sources: |
| // - src/dstr-assignment/array-empty-iter-close.case |
| // - src/dstr-assignment/default/assignment-expr.template |
| /*--- |
| description: Iterator is closed without iterating (AssignmentExpression) |
| esid: sec-variable-statement-runtime-semantics-evaluation |
| es6id: 13.3.2.4 |
| features: [Symbol.iterator, destructuring-binding] |
| flags: [generated] |
| info: | |
| VariableDeclaration : BindingPattern Initializer |
| |
| 1. Let rhs be the result of evaluating Initializer. |
| 2. Let rval be GetValue(rhs). |
| 3. ReturnIfAbrupt(rval). |
| 4. Return the result of performing BindingInitialization for |
| BindingPattern passing rval and undefined as arguments. |
| |
| ArrayAssignmentPattern : [ ] |
| |
| 1. Let iterator be GetIterator(value). |
| 2. ReturnIfAbrupt(iterator). |
| 3. Return IteratorClose(iterator, NormalCompletion(empty)). |
| |
| 7.4.6 IteratorClose( iterator, completion ) |
| |
| [...] |
| 6. Let innerResult be Call(return, iterator, « »). |
| [...] |
| |
| ---*/ |
| var nextCount = 0; |
| var returnCount = 0; |
| var thisValue = null; |
| var args = null; |
| var iterable = {}; |
| var iterator = { |
| next: function() { |
| nextCount += 1; |
| return { done: true }; |
| }, |
| return: function() { |
| returnCount += 1; |
| thisValue = this; |
| args = arguments; |
| return {}; |
| } |
| }; |
| iterable[Symbol.iterator] = function() { |
| return iterator; |
| }; |
| |
| var result; |
| var vals = iterable; |
| |
| result = [] = vals; |
| |
| assert.sameValue(nextCount, 0); |
| assert.sameValue(returnCount, 1); |
| assert.sameValue(thisValue, iterator, 'correct `this` value'); |
| assert(!!args, 'arguments object provided'); |
| assert.sameValue(args.length, 0, 'zero arguments specified'); |
| |
| assert.sameValue(result, vals); |